ATI TEAS 7
Chemistry
1. Which type of orbital can hold a maximum of 10 electrons?
- A. s orbital
- B. p orbital
- C. d orbital
- D. f orbital
Correct answer: D
Rationale: Each f orbital can hold up to 2 electrons, and there are 5 f orbitals, totaling a maximum of 10 electrons.
2. A new medication claims to reduce allergy symptoms by 90%. A study is conducted where 100 participants with allergies take the medication, and 90 report symptom reduction. Should this be enough evidence to recommend the medication for everyone?
- A. Yes, the study shows clear effectiveness.
- B. No, the sample size is too small.
- C. No, a control group without the medication is needed.
- D. No, long-term effects haven't been studied.
Correct answer: C
Rationale: : Comparing the medication group to a group receiving a placebo (inactive substance) would help isolate the medication's true effect and avoid attributing symptom reduction to other factors.
3. Acknowledge the organ devoted to blood filtration.
- A. Liver
- B. Kidneys
- C. Spleen
- D. Pancreas
Correct answer: B
Rationale: The kidneys are the primary organs responsible for filtering blood and removing waste products, excess fluids, and toxins. They play a crucial role in maintaining the body's internal environment and regulating blood pressure.
4. Which property of a substance refers to its ability to be stretched into thin wires without breaking?
- A. Conductivity
- B. Viscosity
- C. Ductility
- D. Malleability
Correct answer: c
Rationale: Ductility is the property that describes a substance's ability to be stretched into thin wires without breaking.
5. Which of the following sentences uses figurative language?
- A. The scientist conducted an experiment.
- B. The child ran like a cheetah.
- C. The book contained many pages.
- D. The teacher explained the concept clearly.
Correct answer: B
Rationale: This sentence uses a simile, comparing the child's speed to a cheetah's.
6. Which statement accurately describes the Linnaean system of classification?
- A. It focuses on evolutionary relationships between organisms
- B. It uses dichotomous keys for identification
- C. It groups organisms based on shared functions
- D. It emphasizes a hierarchical ranking system
Correct answer: D
Rationale: Rationale: The Linnaean system of classification, developed by Carl Linnaeus, is based on a hierarchical ranking system where organisms are grouped into categories based on shared characteristics. This system organizes organisms into a hierarchy of increasingly specific categories, from broad to narrow, such as kingdom, phylum, class, order, family, genus, and species. This hierarchical approach allows for the systematic organization and classification of a wide variety of organisms based on their similarities and differences.
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